Gyratory sifter.



v A. D. HUGHES.

GYRATORY SIFTBR.

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1 6? 9Q Patented July 22, 1913.

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@TATES PATENT ARTHUR D. HUGHES, OF ROCHESTER, INDIANA.

GYRA'IORY SIFTER.

To all whomz't may concern:

Be it known that I, ARTHUR D. Hoonns, a citizen of the United States,residing at Rochester, in the county of Fulton and State of Indiana,have invented certain new and useful Improvements in Gyratory Sifters;and I do hereby declare the following to be a full, clear, and exactdescription of-the invention, such as will enable others skilled in theart to which it apperta-ins to make and use the same, reference beinghad to the accompanying drawings, and to the letters and figures ofreference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in gyratorysifters for milling purposes and comprises asimple and efficient deviceof this nature having various details of construction and combinationsand arrangements of parts which will be hereinafter fully described,shown in the accompanying drawings and then specifically defined in theappended claim.

My invention is illustrated in the accompanying drawings, in whichFigure 1 is a side elevation of my gymtory sifter. Fig. 2 is a detailview of one of the eentrifugally operated rolling members, and Fig. 3 isa detail view of a raceway.

Reference now being had to the details of the drawings by letter, Adesignates a sifter which may be of any improved construction and issuspended by means of reeds B from a fixed object allowing the sifter toswing freely. Said reeds are fastened preferably at their lower ends tothe bracket members C at the corners of the sifter. A verticallydisposed rotatable shaft D is mounted in suitable bearings within thesifter, the bearings, designated by letter E, being prefer ably of theball bearing type. Fixed near each end of the shaft are the two racewaysF, each made up of two curved longitudinal rods which are connectedtogether at their outer ends by cross-pieces H and said sidesSpecification of Letters Patent.

Application filed August 21, 1912.

Patented July 22, 1913. Serial No. 716.272.

F are parallel to each other. A centrifugally operated rolling member K,a. detail of which is shown in Fig. 2 of the drawings, has a centralannular groove K adapted to receive the two sides F of the raceway atpoints diametrically opposite, said sides serving as tracks to guide theroller as it is swung out by centrifugal force. A. flanged pulley N isfixed to the shaft D below the sifter and a belt 0 passes about saidflanged pulley and an idler I journaled in suitaole bearings upon thesifter and is driven from any source of supply not shown.

The operation of my invention will be readily understood and is follows:-lhe parts being adjusted as shown, the rolling centrifugally operatingmembers K nor-.

mally assume the positions shown in Fig. 1 in which they rest againstthe shaft 1). As a rotary movement imparted to the shaft D, the racewayswill bemade to rotate with the shaft and the rolling members will bethrown outward from the shaft and swinging therewith will cause agyratory movement to be imparted to the sieve. When the shaft is atrest, the balls will return to their normal positions and the sifterwill seek its equilibrium.

lVhat I claim to be new is A gyratory structure, a shaft mounted insuitable bearings therein. pulleys, one mounted upon the structure andthe other fixed to the shaft, belted connections with said pulleys,curved arms fastened to the projecting ends of the shaft, parallel toeach other and having their outer ends connected, a roller weight wlthan annular groove engaging said curved arms to guide the roller weights,as set forth In testimony whereof I hereunto at my signature in thepresence of two witnesses.

ARTHUR D. HUGl-HGS.

lVitnesses CHARLES A. Burns, E. C. MERCER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

